Her lack of rank insignia determines she was not an officer or chief, but rather enlisted. Although she wears the division patch for command, her uniform color indicates she's operations division. The function of her station, located between the viewscreen and Spock's station, was never alluded to, although it seemed to include various library computer functions and controls later associated with the science station and was scripted, in the second revised final draft, as the communications station.

When Spock later decided to cut his losses and ordered the Enterprise to escape orbit of Talos IV, and it was discovered that that ship's controls had gone dead, Jose Tyler had this crewman double-check the systems, in turn, Tyler relayed a response to Spock, confirming that "There's nothing. Every system aboard is fading out!" (TOS: "The Cage")

This engineer served aboard the Enterprise in 2254. He was operating the main engineering station on the bridge when the Enterprise picked up a distress signal, when the ship approached Talos IV, when the ship's power was drained and when the Enterprise was preparing to leave Talos IV. (TOS: "The Cage")

While the name "Transporter Chief Pitcairn" appears in numerous reference guides, including the Star Trek Concordance, Star Trek Compendium and Star Trek Encyclopedia, the character himself was only ever identified in the script and on call sheets as the "Transporter Chief". The probable source of the incorrect naming in those references can be found in the script for "The Menagerie", which named the lead security guard in both episodes as "Security Chief Pitcairn".

This crewman participated in the fight between Enterprise crewmembers and Koloth's Klingon crewmen at Deep Space Station K-7, and were interrogated by Kirk afterwards, in 2268. After he was released from quarters confinement, he was present in the tribble-infected recreation room, when Kirk and Spock visited it. (TOS: "The Trouble with Tribbles")

This crew woman was affected by the energy being drained away from the ship and crew, and were treated in sickbay, when the Enterprise encountered a giant single cell lifeform in 2268. (TOS: "The Immunity Syndrome")

This crew woman was present on the bridge in 2268, when the Kelvans attempted to hijack the Enterprise and divert it to the Andromeda Galaxy. She was considered one of many non-essential personnel. Kelvan Drea neutralized and reduced her into a dehydrated porous cuboctahedron solid, the size of a Human fist, composed of her base minerals which represented the "distilled" essence of her being. She was reconstituted after the four commanding officers, who were not neutralized, regained control of the ship. (TOS: "By Any Other Name")

Later, when the ship was invaded by the Scalosians, she was on the bridge delivering beverages. Kirk asked her, "Yeoman, is that coffee available, or have those circuits been damaged as well?" Unbeknownst to either of them, the coffee had been tainted by the Scalosians. (TOS: "Wink of an Eye")

McCoy informed the yeoman that he was going to be getting a few days' bed rest, for an unknown injury or ailment, despite the fact that the doctor didn't think he deserved it. Before the yeoman had a chance to acknowledge his prescription, he was startled by McCoy's sudden abduction from the ship by Kukulkan. (TAS: "How Sharper Than a Serpent's Tooth")

The novelization of "How Sharper Than a Serpent's Tooth" in Star Trek Log 6 identifies him as Jo van Dreenan (β), security specialist.

This engineering crewman served on the Enterprise in 2266, during the encounter with the First Federation.

At the time he was testing the circuitry on the ship when he was tossed about with the destruction of Balok's cube and from the sheer force of the Enterprise breaking away from Balok's pilot vessel. (TOS: "The Corbomite Maneuver")

This engineering crewman was present on the bridge when the Enterprise was searching for the wrecked USS Constellation. He was later called to the bridge to repair the damage, when the Enterprise encountered the Planet killer in 2267. (TOS: "The Doomsday Machine")

That year he was present in main engineering when Nomad had entered engineering, where he was informed by Scott to notify Captain Kirk of Nomad's presence. When Nomad began to make unsanctioned repairs to the ship's warp drive, he exclaimed to Scott the increasing warp factor, at one point noting that they had reached Warp 11.

Later, he was knocked out by Nomad, during Nomad's return to engineering. Kirk noticed his slumped over his console and even checked his pulse before finally confronting Nomad. Following the entry of Spock and Scott into engineering, two additional crewman following, removing this crewman from his chair and placing him on the deck. (TOS: "The Changeling")

Played by Meade Martin. He was identified in the script as "Crewman #1" and credited in the end credits as "Crewman".

Also the same year, he was affected by the interspace mental degradation, and went berserk at the memorial service for Captain Kirk and attacked Lieutenant Hadley. He had to be sedated and taken away. (TOS: "The Tholian Web")

According to the 10 May1973 revision of the script, this crewman one of "other engineers" Kirk was addressing in his request. Earlier in the same scene, the script noted that Scott was surrounded by "Engineers and a couple of Security men."

This junior engineer was a lieutenant junior grade, who was assigned by Scotty, per the duty roster, to repair a power relay (with a trident scanner) but was surprised to find an ensign and a doctor (actually Miles O'Brien and Julian Bashir from the 24th century) already working on it. The two officers quietly allowed the engineer to take over as it became clear they had no idea what they were doing. Fortunately, he easily accepted Bashir's cover story - that he was doing a study on work-related stress, with O'Brien as his overworked, stressed-out patient - and agreed not to mention the incident, adding that he hoped O'Brien felt better. (DS9: "Trials and Tribble-ations")

Played by Charles Chun. He was described in the script as "a fresh-faced young engineer -- lieutenant, junior grade."

According to the end credits, a George E. Allen was credited as "Engineer #1", however, it is unclear which character he represented, with this individual in particular being the only other Enterprise engineer to appear in this episode.

In 2268, this commander stood in on a staff meeting after the Enterprise was facing capture by the Romulans when Captain Kirk took the ship into the Romulan Neutral Zone. (TOS: "The Enterprise Incident")

The appearance of a full Commander, outside of the regular cadre of permanent characters, is slightly unusual, as such a person would outrank such major characters like McCoy and Montgomery Scott. In any case, in the memorial appearance, this man could be seen wearing no rank insignia on his sleeves.

This security guard was stationed aboard the USS Enterprise when Harry Mudd came aboard in 2266.

He was ordered to take Mudd from Kirk's quarters to the assigned quarters for Mudd, but he instead escorted Mudd to the conference room, where he remained on guard alongside Vinci. When asked by Mudd to wait outside, he told Mudd that he would not, and remained within earshot of Mudd, and was often spoken at by Mudd to clarify anything suspicious he and Vinci may have overheard. The two guards remained at the post throughout Mudd's subsequent hearing.

He would later be assigned to guard outside of Mudd's quarters, before being given the duty to inform Kirk of the arrival of Ben Childress and Herm Gossett to the captain's quarters. (TOS: "Mudd's Women")

He was also present in the recreation room in 2268, when Uhura introduced tribbles to her crewmates. He was assigned to keep order among the crewmembers on shore leave and the Klingons when the Enterprise visited Deep Space Station K-7 and he had to break up the fight between the crewmembers on shore leave and the Klingons. He carried the pair of Tribbles that Kirk used to determine that Arne Darvin was a Klingon. (TOS: "The Trouble with Tribbles")

This crewman was on the bridge bringing the captain a report shortly before the Enterprise was taken over by the Beta XII-A entity. He later assisted in escorting another security officer to Sickbay. (TOS: "Day of the Dove")

The same year, he fought against Kang's Klingon personnel when both crews were under the influence of the Beta XII-A entity during the initial conflict in the crew lounge before taking the injured Lieutenant Johnson to sickbay. He was later struck, while conferring with Scotty, by the Klingons as they took main engineering. (TOS: "Day of the Dove")

This security crewman was summoned to the bridge when EnsignPavel Chekov went berserk by the effects of the interspatial rift. Later, he was also present at Kirk's memorial service, in 2268. (TOS: "The Tholian Web")

This security crewman was also summoned to the bridge when Chekov went berserk by the effects of the interspatial rift. Later, he was also present at Kirk's memorial service, in 2268 where he helped restrain a berserk crewman. (TOS: "The Tholian Web")

This security guard also participated in the fights against Kang's Klingon crew under the influence of the Beta XII-A entity, in 2268. He was injured, and had to be taken to sickbay by another security crewman. (TOS: "Day of the Dove")

The same year, along with Carlisle, he was given the duty of replacing the two deceased guards escorting Nomad. Both this lieutenant and Carlisle were subsequently killed by the probe. (TOS: "The Changeling")

This lieutenant was given the duty of escorting Nomad to the brig and guarding it, in 2267. He was seemingly vaporized by the probe after it escaped and began roaming freely through the corridors of the ship. (TOS: "The Changeling")

"The Trouble with Tribbles" writer David Gerrold played this unnamed, uncredited extra. He had reportedly written a cameo for himself (as Mr. Freeman) in that original, but was unable to be included in the filming. With new footage being filmed taking place in that episode almost thirty years later, Gerrold got to rectify that mistake playing a redshirt. He did have other Star Trek appearances in the interim (see Command division crewmember below).

In 2268, this male security officer, smaller than his counterpart above, was one of several called in to break up a fight which had broken out between Enterprise officers and Klingon officers from the IKS Gr'oth. He ended up arresting Julian Bashir. (DS9: "Trials and Tribble-ations")

This lieutenant stood watch outside main engineering along with Hikaru Sulu. A short time later, he and Sulu assisted Scott as he escaped main engineering, after it was taken by the Klingons. He, Scott and Sulu then split up and tried to make it back up to the bridge. He later joined Spock, McCoy and several other guards in returning to main engineering, where he and the other security personnel had a final battle before being ordered to lay down their weapons by Kirk and Kang. (TOS: "Day of the Dove")

This individual was a caricature of the episode's writer, David Gerrold, that was added as an in-joke, whereas he was described in the 23 April1973 revision of the script as "a transporter ensign who looks like the author."Gerrold told a story recalling this in the audio commentary from TAS: "Bem", stating "There was a line in the script that the transporter crewman looked suspiciously like the author of the episode. Which was me writing myself into the animated series. And sure enough, when they drew that scene, when they animated it, the animators had some fun and drew a little caricature of me at the transporter control. So I was the transporter crewman in the animated episode just as a... there's no dialogue, it's just a sight gag. And a few people recognized me but not very many. I mean, it was just an in-joke."

According to the novelization of the episode by Alan Dean Foster this individual was named "Hacker." Gerrold also noted this in his audio commentary, stating that he felt that it "was kind of an insult to call another writer a "hack." It means you're not very good."

All 170 crewmembers were played by extras, production staff members, and fans and most of them received no on-screen credit for their appearances. They were cast by a cattle call, organized by Bjo Trimble and had to fullfill these special requests: "aged between 20 and 40, men from 5'8" to 6'2", sizes 40-42, and women from 5'6" to 5'8', sizes 8-10".

This unnamed character, played by Billy Van Zandt, was identified as "Alien Ensign" in the script, and "Alien Boy" in the end credits.

According to Van Zandt, he was working at the Internal Security station.(citation needed • edit) His single line of dialogue with Uhura, about Decker's demotion, was not used in the theatrical print of the film, but was restored for the premiere television broadcast (ie. the "Special Longer Version" on the home video releases), and for the "Director's Edition" on DVD.

This recurring Starfleet crewman was played by background actress and stand-inKimberly L. Ryusaki, who received no credit for her appearances.

During the preproduction of The Search for Spock, Ryusaki happily noted her appearance in the new film, explaining "We're no longer cadets. Now, we're full-fledged officers on the Bridge!" (Starlog #80, March 1984, p. 44)

She was also the only non-main cast member to appear on the bridge of the Enterprise-A in The Voyager Home.

These engineering crewmen were assigned to the machine room of the Enterprise during the training cruise and Khan Noonien Singh's attack. They were present when Admiral James T. Kirk visited the ship shortly before its launch. Both crewmen were later present at the memorial service for Spock. (Star Trek II: The Wrath of Khan)